Dark matter, Mach's ether and the QCD vacuum

In summary, the paper discusses the concept of Mach's ether, dark matter, and the QCD vacuum as three modes of existence of the same entity. The author uses comments from Einstein and Lemaitre to support his argument, but notes that his theory may be outdated. He also suggests that the main discovery of LCDM is the existence of Mach's ether, which represents 95% of the universe. However, there is some confusion as to whether dark matter or dark energy is considered Mach's ether. The author proposes that the scalar field in the Brans-Dicke theory could be Mach's ether and is possibly related to dark energy and the QCD vacuum. This theory would need to account for the mass of the scalar field without
  • #1
wolram
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I have found this paper, it seems interesting although i haven't read it all yet arXiv:1507.00460 [pdf]
Dark matter, Mach's ether and the QCD vacuum
Gilles Cohen-Tannoudji
Subjects: History and Philosophy of Physics (physics.hist-ph); Cosmology and Nongalactic Astrophysics (astro-ph.CO)
 
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  • #2
Thank you wolram for that link.

His basic conjecture is,
Mach’s ether, dark matter and QCD vacuum are three modes of existence of a same entity."

He uses Einstein and Lemaitre's comments to builds his case, which may be now a little outdated.

I also found it a bit confusing as later he says,
So, if our conjecture is correct, one can say that the main discovery of LCDM is that the Mach’s ether (dark matter + dark energy) not only exists, which hitherto had never been clearly established, but also represents 95% of the content of the universe. What a beautiful confirmation of the Einstein’s statement that “according to the general theory of relativity, space without ether is unthinkable”!

So is he suggesting DM or DE as 'Mach's ether", or both?

Personally I would have taken the Brans Dicke route and suggested that their scalar field might be called 'Mach's ether' and is the same as DE, and possibly the QCD vacuum, rather than the same as DM. But then you would have to find a way of having a massive enough scalar field without it perturbing solar system GR experiments...

Garth
 

FAQ: Dark matter, Mach's ether and the QCD vacuum

What is dark matter?

Dark matter is a mysterious type of matter that does not interact with light or any other form of electromagnetic radiation. It is invisible and cannot be directly observed, but its existence can be inferred by its gravitational effects on visible matter.

What is Mach's ether?

Mach's ether, also known as the aether, was a concept proposed by physicist Ernst Mach in the late 19th century. It was thought to be a medium that filled the entire universe and served as a reference frame for the motion of objects. However, this concept has been largely discredited in modern physics.

What is the QCD vacuum?

The QCD (Quantum Chromodynamics) vacuum is the lowest energy state of the vacuum in the theory of quantum chromodynamics, which describes the strong interactions between quarks and gluons. It is characterized by a non-zero energy density and is thought to play a crucial role in the behavior of particles and the structure of matter.

How is dark matter related to Mach's ether and the QCD vacuum?

There is no direct relationship between dark matter, Mach's ether, and the QCD vacuum. However, some theories suggest that dark matter particles may interact with the QCD vacuum, and the aether has been proposed as a possible explanation for the existence of dark matter. However, these theories have not been widely accepted in the scientific community.

Can dark matter, Mach's ether, and the QCD vacuum be directly observed?

No, all three of these concepts cannot be directly observed. Dark matter is invisible and does not interact with light, Mach's ether has been largely discredited in modern physics, and the QCD vacuum is a theoretical concept that cannot be observed directly. Scientists rely on indirect evidence and mathematical models to study and understand these phenomena.

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